ESX 4

Console-Setup, it’s menu driven!

Troubleshooting Service Console issues has always been a little bit annoying (well, at least to me 🙂 ). However, since ESX4 Update 2, there is a new command that will make your life a little bit easier. Login to your ESX server and take a look at #console-setup command. As you can see, it is menu driven and extremely easy to use. Pressing 1, 2 or 3 will display information about vswif, NIC’s and vSwitch/DVS. Press […]

ESX 4

Boot ESX 4 from SAN on IBM HS22 Blade Server.

Wow, it has been a while since my last blog! I’ve been working on a large virtualization project at one of our customers lately, which involved diskless IBM HS22 blade servers with two QLogic QMI2582 Fiber Channel adapters. We configured the ESX host to boot from SAN, which was an IBM DS5300. The procedure below describes how to configure boot from SAN of an ESX 4.0.0 U2 server. It does not cover installing ESX itself. First, login to the IBM BladeCenter with […]

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ESX 3.5

Unload unnecessary modules from your ESX host.

“Turn off what you do not need” is my motto 🙂 . So, if you are not using the VMFS-2 (which you probably aren’t using since ESX 3.x) and/or NFSClient in you environment than you can safely unload these modules from your ESX host. You can list currently loaded modules with #esxcfg-module –q and if you want to disable the modules mentioned above then: Login to you ESX host as root user First, unload the […]

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ESX 3.5

Monitor VMkernel activity with the tail command.

The tail command displays last 10 lines of a file and with the –f (follow) parameter you can see the data appended to it. So, if you want to see what is going on in the vmkernel of your ESX host: Login to you ESX host Type: #tail –f /var/log/vmkernel Watch for new events to appear If you want to terminate the process,  press CTRL + C Nice & simple 🙂 Cheers! – Marek.Z

No Internet Access
Microsoft

Disable “No Internet Access” notification on Windows Server 2008 (R2).

The “No Internet Access” notification on the network connection icon usually appears when you’re not connected to the Internet or you probably behind a proxy server. However, when you setting up your servers in an isolated environment without Internet access and you want to disable this notification then: Open the GPMC.msc. Create or open a GPO which will be applied to your server(s). Navigate to Computer ConfigurationPoliciesAdministrative TemplatesNetworkNetwork Connections. Enable the “Do not show the […]

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Dell

Dell PowerConnect 6224 – Lessons Learned.

A few days ago I had a chance to configure a Dell EqualLogic PS4000XV iSCSI SAN connected through two Dell PowerConnect 6224 switches during a virtualization project at one of our customers. Although the configuration of the switch is quite straightforward, there are some configuration settings that should be considered. Enable the Rapid Spanning Tree Protocol on the switch as well as the “spanning-tree portfast” feature on all ports connected to the SAN Enable Jumbo […]

Windows Boot Manager
Microsoft

Delete invalid entry from the boot configuration data store on Windows Server 2008 (R2).

Recently I came across the following issue on a HP DL380 G5 server with freshly installed Windows Server 2008 R2 (click on the picture for a larger image). I have no idea what caused this. Probably an unfinished Windows installation or something. Anyway, it was annoying me 🙂 so I decided to remove the invalid boot configuration identifier from the boot configuration data store. When logged in with an Administrator account, start the command prompt. […]

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ESX 4

Configure Jumbo Frames on Hardware iSCSI HBA in ESX 4.

Before you begin, check the names of the vmhba adapters on your ESX server. From the vSphere Client go to Configuration tab and click on Storage Adapters. Now, to set Jumbo Frame support (MTU 9000) on your hardware iSCSI HBA, follow these steps: Login as Root user on your ESX server. Type: #esxcfg-hwiscsi –j enable <vmhba#> If successful, you should get the “MTU size successfully set to : 9000” message. To verify the change type: #esxcfg-hwiscsi –l  <vmhba#> All done! Cheers! […]